TL;DR — Quick Summary

Biome is a blazing fast formatter and linter for JS, TS, JSX, JSON, and CSS. One tool replaces ESLint + Prettier — 35x faster, zero config.

Biome replaces ESLint + Prettier in one tool. 35x faster, zero config, one dependency.

Installation

# npm
npm install --save-dev @biomejs/biome

# pnpm
pnpm add --save-dev @biomejs/biome

# Initialize config
npx biome init

Usage

# Format all files
npx biome format --write src/

# Lint all files
npx biome lint src/

# Check everything (format + lint + organizing imports)
npx biome check --write src/

# CI mode — check without writing
npx biome ci src/

# Single file
npx biome check file.ts

Configuration

biome.json:

{
  "$schema": "https://biomejs.dev/schemas/1.9.0/schema.json",
  "formatter": {
    "indentStyle": "space",
    "indentWidth": 2,
    "lineWidth": 100
  },
  "linter": {
    "rules": {
      "recommended": true
    }
  }
}

Comparison

FeatureBiomeESLint + Prettier
Speed⚡ 35x fasterBaseline
Config files1 (biome.json)2+ (.eslintrc, .prettierrc)
Dependencies120+
LanguageRustJavaScript
CSS support✅Separate tools

Summary

  • Biome: one tool for formatting + linting
  • 35x faster than ESLint — written in Rust
  • Zero config — works out of the box
  • Supports JS, TS, JSX, JSON, CSS
  • Built-in import organization